Electromagnetic wave of radar propagates abnormally in the duct. It is very important to study the influence of the duct on radar detecting zone.

大气波导会使雷达电磁波传播产生异常现象，研究其对雷达探测范围的影响具有重要意义。

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There is no uniform measure for dynamic performance of AEW radar detecting area yet.

机载预警雷达的动态探测性能尚无统一的度量标准。

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The main procedures are briefly introduced here, such as radar detecting, hail cloud identifying, operation commanding, effect analyzing, etc.

本文扼要介绍雷达观测、雹云识别、作业指挥、效果分析等部分主要技术规程。

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It should be noted, however, that even with modern radar technology detecting more minor tornadoes that could be detected in prior decades, the number of F2-to-F5 tornadoes (in other words, all but the very weakest of tornadoes) has similarly been declining since the mid-1970s.

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This information has been provided by Radarsat, a Canadian satellite capable of detecting detailed water and land features through thick clouds, fog and rain using synthetic-aperture radar equipment.

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